Big Horn, WY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Big Horn, a community in Sheridan County, Wyoming.
Overnight
32°F
Clear
Clear, with a low around 32. West southwest wind around 1 mph.
7-day forecast for Big Horn
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 32°F | Clear | 1 mph WSW | 0% |
| Wednesday | 55°F | Sunny | 0 to 5 mph NNW | 0% |
| Wednesday Night | 30°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 59°F | Mostly Sunny | 5 mph NW | 0% |
| Thursday Night | 32°F | Mostly Cloudy | 1 to 5 mph W | 11% |
| Friday | 53°F | Mostly Sunny | 1 to 5 mph W | 11% |
| Friday Night | 32°F | Mostly Clear | 2 to 8 mph SW | 0% |
| Saturday | 60°F | Sunny | 0 to 6 mph W | 0% |
| Saturday Night | 35°F | Mostly Clear | 0 to 6 mph SSW | 0% |
| Sunday | 69°F | Sunny | 0 to 8 mph SW | 1% |
| Sunday Night | 39°F | Partly Cloudy | 0 to 7 mph WSW | 1% |
| Monday | 59°F | Mostly Sunny | 0 to 3 mph NW | 0% |
| Monday Night | 38°F | Partly Cloudy | 2 mph SW | 1% |
| Tuesday | 64°F | Mostly Sunny | 3 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Big Horn (44.679, -106.997). Updated through the day.
Growing snapshot for Big Horn
Last spring frost
May 24
First fall frost
Sep 23
Growing season
120 days
Hardiness zone
5a
More local growing data for Big Horn: nearby ZIP 82842 weather · frost dates · planting calendar · Wyoming frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Story, Wy (1.7 mi from Big Horn). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.